|
Dalmatian Toadflax
Scrophulariaceae, the figwort family
 BACKGROUND: Dalmatian toadflax is native to the Mediterranean region.
It is likely an escaped ornamental plant that is an invader of dry timber
and rangelands. Dalmatian toadflax spreads both by seeds and roots.
DESCRIPTION: Dalmatian toadflax is a
perennial that grows up to 4
feet tall. Waxy green
 leaves are heart shaped, 1 to 3 inches long, and clasp
the stem. Flowers are 1 inch long (excluding the 1/2-inch spur), yellow,
often tinged with orange or red, and similar in shape to snapdragon. Plants
flower from midsummer to fall. Seeds are produced in a 1/2-inch pod and are
irregularly wing angled.
DISTRIBUTION: Dalmatian toadflax is primarily a weed of the
intermountain West, including most counties in Idaho, but a population also
exists in the Great Lakes region.
CONTROL: A biological control agent (defoliating moth) is available,
and its effectiveness has been very good in Idaho. This weed can be
controlled with herbicides.
|
BACKGROUND: Dalmatian toadflax is native to the Mediterranean region.
It is likely an escaped ornamental plant that is an invader of dry timber
and rangelands. Dalmatian toadflax spreads both by seeds and roots. 
leaves are heart shaped, 1 to 3 inches long, and clasp
the stem. Flowers are 1 inch long (excluding the 1/2-inch spur), yellow,
often tinged with orange or red, and similar in shape to snapdragon. Plants
flower from midsummer to fall. Seeds are produced in a 1/2-inch pod and are
irregularly wing angled. 